Devh

Where does Porsche say premium is a scam, I must have missed it.

Devh

I found this article interesting. See where the 460 is listed.

http://www.autoguide.com/auto-news/2...premium.html/2

roadfrog

And also note that nowhere in there does it list Porsche requiring 87 octane....or even 89 for that matter. Premium only.

SW17LS

How about that?

dlbuckls10

Many vehicles requires premium unleaded, heavy duty battery, SAE oil, etc. and I think you should go with what's required if possible. Each to their own.

Lexus081

i don't believe that article, as another user here posted info from porsche saying their vehicles don't require premium gas, but i see porsche on the "required" list on that site which makes me think it's a sham
i have been putting regular gas in my lexus for months and it runs absolutely beautifully

Lexus081

he said that porsche's can run on regular without any damage, and the other guy at chevron said he puts regular in his car even though owner's manual recommends premium.

the reason i said premium is a scam, is because... what point is there of putting a more expensive gas into your car if you can put the 87 regular and it will not cause any damage, and it'll work just as well? unless of course you're going to a race rally or something..

if i came to you as a salesman, and i showed you a stapler that had cool lights on it, super cool holograms, and a lot of other cool stuff, but in the end i said that, but your regular stapler that you got from walmart for $6.99 works just as fine and won't damage your paper...
what would you call my stapler?

Devh

As I stated in the beginning of this thread I'm not familiar with current technology post 2005 that allows you to run 87 in a high compression engine so I did my research last night and updated my knowledge base.

It boils down to this.
There are three categories of vehicles

1. Cars that require 87
2. Cars that can safely use both 87 and premium, and have a little better performance when using premium.
3. Cars that require premium only however can use 87 if the wrong gas is used or not available for a short time until premium can be obtained. These cars can knock, will diminish the economy and can cause premature catalytic failure because of increased cylinder temperature and increased emissions.

With number 2 cars the manufacture explicitly states that premium is recommended for max performance but the car will safely run on 87.

Case in point.:
http://www.ellsworthamerican.com/liv...equus-part-one

"While the Lexus recommends premium fuel only, Hyundai says you can use premium or regular grade fuel; regular grade gas will just lower the HP rating by eight."

Lexus also has a few engines that can be run on 87 safely giving a performance advantage when you run 91.
These engines are lower compression including the Hyundai. They basically can advance timing to take advantage of premium fuel which is entirely different then retarding ignition to prevent knock. These engines can use 87 safely and the manufacture has explicitly stated that fact that makes the distinction.

Then there is the question of some of the turbo charged cars on that list. Most of those modern turbo engines are able to regulate boost to accommodate lower octane fuels . The regulation of boost is the single best technology to accomplish this.

The technology of variable valve timing and ignition timing has gone a long way to make these cars adapt to lower octane safely but it must be pointed out that it also goes along with the engine design to be able to do so. Our 1UR-FSE is not one of those engines unfortunately.

Devh

It's only a sham when it's not in line with your argument.

SW17LS

Of course you don't. And where is this "info from Porsche"?

Because I purchased a very expensive vehicle that costs more than some people pay for their home. The manufacturer of that vehicle says that I should use premium. So...I do. It costs me on average about $7 more per fill up. If you don't want to use premium, don't. Stop trying to convince others to do as you do though...just do what you want.

Lexus has changed their recommendations for fuel before, the ES and RX as an example, they amended the recommendation in 2011 to allow for the use of regular and they reduced the advertised HP of that vehicle to reflect the difference in fuel. They did not do that for the LS. Why wouldn't they if it was no issue? Toyota doesn't sell fuel, AutoGuide doesn't sell fuel. What is the motivation for this elaborate "sham" you seem to think is being perpetrated here?

Lexus says change the oil every 10k, so I change the oil every 10k. They say to use 0W20 synthetic oil, so thats what I do. They say to use premium fuel, so thats what I do. If I wanted to drive something that I felt comfortable putting the cheapest option for everything in...I wouldn't be driving something that costs me $1000 a month in the first place.

Lexus081

heres the info from porsche that another user posted

SW17LS

Thats a quote, there is no link or source but lets take it at face value. Porsche is saying exactly what I have been saying in these threads. Lets break it down:

So heres what they said. Using regular will not hurt the car, but it will not perform at its maximum capability.

Which is exactly what I have repeatedly said. My guess is that using regular won't hurt the LS460, but the car will not perform at its peak, and since we all paid a premium for the car, why would you accept lesser performance to save a few dollars?

Devh

How is that possible, it's a complete scam.

SW17LS

I think he may be on to the fact that we too are all in bed with the oil companies.

Have you gotten your check from "big oil" this month? Mine came a little late lol

Devh

As an agent of the monarchy mine comes directly from the Queen. Royal Dutch Shell.